Epson 214D-1 user manual Output Pulse and Flow Alarm

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20 Operation

3.5The Output Pulse and Flow Alarm

An OUTPUT PULSE is available on terminal 10 for driving remote counters and produces a pulse each time the Accumulated Total increments by one digit. For example, if the Accumulated Total has a resolution of 0.01 gallons, a pulse is produced each 0.01 gallons.

The pulse is a current sinking pulse of approximately 10msec produced by an open collector transistor and can sink up to 100mA. The maximum pulse rate is limited to 49 pulses per second and the resolution on the Accumulated Total must be set so that the Accumulated Total increments at less than 49 counts per second.

Note that due to the uneven pulse output spacing on this output, the pulse output cannot be used to drive rate indicators.

The FLOW ALARM uses an identical circuit to the Output Pulse and is available on terminal 7.

The Flow Alarm will output an alarm condition if the flow times out during a batch (i.e., there is no flow registered for a time greater that the Signal Timeout period, provided the Signal Timeout is greater than 0).

The Flow Alarm output will switch “on” (i.e., the signal goes low) whenever an alarm condition exists. The Alarm will switch “off” (i.e., the signal goes high) when the alarm is reset by pressing the DISPLAY key.

HP289

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Contents USER’S Manual HP289 HFC Warranty Contents HP289 Introduction Model Number Designation Model 214D- aIntroduction 2A Introduction 2B This page intentionally left blank HP289 Specification GeneralPulse Output Operation Setting the Batch Quantity Front Panel OperationResetting Starting a BatchStopping Displayed InformationLimit on Batch Size Accumulated TotalBatch Operations Page Control Relays Signal Timeout Flow AlarmEnd-of-Batch Signal End-of-BatchAuto Restart Automatic Overrun Compensation = fxH Calculation of Rate and Total Frequency InputFiltering 103 Total Conversion For ExampleOutput Pulse and Flow Alarm Page RS232/422/485 Interface Option OptionsHardware Multipoint Communication RS422 Interface HP289RS485 Interface HP289 Communication Protocol PrinterComputer Configuration RUNPage Configuring the Setup Parameters BaseStep Display Description Text Entering the Batch Parameters Signal Timeout in seconds Setting to Disables this featureDis EOB Configuring the Options DateEcho Checking the Input Signal Input Circuits Input Circuit for the 214D SeriesSwitch Settings General SpecificationInput Circuits Frequency Input Circuit HP289 Page Page Remote Key Switches Installation GeneralRC Networks for Interference Suppression Terminal Wiring Designations Terminal Relay Option & SwitchesTerminalDescription Terminal RS232/422/485 OptionTrouble Shooting Counting erratically No end of batch, pulse output, or flow alarmInstrument acting erratically Error Codes Input ErrorsOutput Errors Configuration ErrorsIndex Front PanelTerminal Wiring

214D-1 specifications

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